- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°23'55"N 3°52'31"W
- Eastings/Northings: 272500, 279500
- OS Grid: SN725795
- Mapcode Local: GBR 91.PVXC
- Mapcode Global: VH4FG.SZ33
Location and coordinates are for the approximate centre of Llyn-Yr-Oerfa within this administrative area.
Geographic features and populated places may cross administrative borders.